TL1431QPWR

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Reference
• Characteristics: Precision, Adjustable Output Voltage, Low Power Consumption
• Package: SOT-23-5
• Essence: TL1431QPWR is a precision shunt regulator that provides a stable reference voltage for various applications.
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Reference Voltage Range: 2.495V to 36V
• Initial Accuracy: ±0.4%
• Temperature Coefficient: 50ppm/°C
• Sink Current Capability: 1mA to 100mA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The TL1431QPWR package consists of five pins: 1. Cathode (K): Connected to the reference voltage output. 2. Anode (A): Connected to the input voltage or potential divider network. 3. Adjust (ADJ): Used to adjust the reference voltage. 4. NC (No Connection): Not internally connected, left unconnected. 5. Ground (GND): Connected to the ground reference.

Functional Features

• Precision Voltage Reference: TL1431QPWR provides a highly accurate reference voltage, ensuring stability in various applications.
• Adjustable Output Voltage: The reference voltage can be adjusted using an external resistor divider network connected to the ADJ pin.
• Low Power Consumption: The IC operates with low power consumption, making it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages

• High precision and accuracy
• Wide range of adjustable output voltages
• Low temperature coefficient ensures stability over varying temperatures
• Low power consumption extends battery life

Disadvantages

• Limited sink current capability compared to other voltage regulators
• Requires an external resistor divider network for voltage adjustment

Working Principles

The TL1431QPWR operates as a shunt regulator, maintaining a stable reference voltage between the Cathode and Anode pins. The Adjust pin allows for fine-tuning of the reference voltage by adjusting the current flowing through the internal resistors. This voltage can be used as a reference for other circuitry or compared against an input voltage to provide regulation.

Detailed Application Field Plans

• Precision Voltage Regulation: TL1431QPWR is commonly used in precision analog circuits, such as data acquisition systems, where a stable reference voltage is crucial.
• Battery Charging Systems: The adjustable output voltage feature makes it suitable for battery charging applications, allowing precise control over the charging voltage.
• Power Supply Regulation: TL1431QPWR can be used as a voltage reference in power supply circuits to ensure stable and accurate output voltages.

Detailed and Complete Alternative Models

• TL431: Similar functionality and specifications, available in different package options.
• LM4040: Precision shunt voltage reference with similar characteristics, available in various voltage options.
• REF3030: Low-power, high-precision voltage reference IC with adjustable output voltage.

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